qreator crashed with SIGABRT in g_mutex_unlock_slowpath()

[Dmitry Shachnev]

QReator crashed when I tried to start it without any arguments on a (mostly) clean Ubuntu installation.

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: qreator 13.05.3-2fakesync1
ProcVersionSignature: Ubuntu 3.16.0-17.23-generic 3.16.3
Uname: Linux 3.16.0-17-generic x86_64
ApportVersion: 2.14.7-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Sep 25 18:55:02 2014
ExecutablePath: /usr/bin/qreator
InstallationDate: Installed on 2014-08-23 (32 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140823)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/qreator
Signal: 6
SourcePackage: qreator
StacktraceTop:
 g_mutex_unlock_slowpath (mutex=<optimized out>, prev=<optimized out>) at /build/buildd/glib2.0-2.41.5/./glib/gthread-posix.c:1327
 gtk_main () at /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmain.c:1191
 ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
 ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
 ?? () from /usr/lib/python2.7/dist-packages/gi/_gi.so
Title: qreator crashed with SIGABRT in g_mutex_unlock_slowpath()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 g_mutex_unlock_slowpath (mutex=<optimized out>, prev=<optimized out>) at /build/buildd/glib2.0-2.41.5/./glib/gthread-posix.c:1327
 gtk_main () at /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmain.c:1191
 ffi_call_unix64 () at ../src/x86/unix64.S:76
 ffi_call (cif=0x1a90160, fn=0x7f10608c7110 <gtk_main>, rvalue=0x7fffee543910, avalue=0x0) at ../src/x86/ffi64.c:525
 pygi_invoke_c_callable (function_cache=0x1a900e0, state=0x7fffee543980, py_args=0x6, py_kwargs=0xffffffffffffffff) at ../../gi/pygi-invoke.c:628

[Removed by request (stoni.ch-deactivatedaccount)]

Same here